A friend of mine in northern Alberta asked me to find and restore a 1972 Mustang. So, I searched and found this R Code Mach 1 in Grabber Blue. Originally came from PA (so I added a PA license plate to the front). Only 366 R Codes were made in 1972; so that means the '72 R Codes (in Coupes, Fastbacks, or Mach 1's) are the rarest (and least known) Mustangs ever. They are almost identical to the 1971 Boss 351's, except for the name and hood-paint, open-chambered heads instead of the closed chamber heads in the 71. They also can run on pump gas. No A/C allowed (the 3.91 trac.lok rear end would burn out the AC compressor); all came with 4-speed trannys. This Mach 1 could really melt the tires and make all Camaros eat its dust. Fastest car I've ever driven. Oh to find an R Code in Bright Lime!